Cheat codes for Ground Zero, Texas

Ground Zero, Texas Reduced Camera Damage
While fighting, close all four of the Battle Cam's shields at once. That way one camera will take the bulk of the damage, preserving the others.

Ground Zero, Texas Secret Scene
To view a secret scene you must deliberately lose a game. When the credits begin to roll, press C, B, A in one quick motion, then press Start. The secret scene will now appear.